From ef2156cf4be33e099637c753ab46c5b76e15b167 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 27 Mar 2015 13:10:06 +0100 Subject: [PATCH] ARM: EXYNOS: Handle of of_iomap() failure Prevent possible NULL pointer dereference if of_iomap() fails. Handle the error by skipping such power domain. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Kukjin Kim --- arch/arm/mach-exynos/pm_domains.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index a9686535f9ed..b15f8663f9fc 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -138,6 +138,14 @@ static __init int exynos4_pm_init_power_domain(void) pd->pd.name = kstrdup(dev_name(dev), GFP_KERNEL); pd->name = pd->pd.name; pd->base = of_iomap(np, 0); + if (!pd->base) { + dev_warn(&pdev->dev, "Failed to map memory\n"); + kfree(pd->pd.name); + kfree(pd); + of_node_put(np); + continue; + } + pd->pd.power_off = exynos_pd_power_off; pd->pd.power_on = exynos_pd_power_on; -- 2.20.1